Mutual Defense Agreement (1958)
E6872
The Mutual Defense Agreement (1958) is a landmark Cold War-era treaty that deepened U.S.–UK strategic cooperation by enabling extensive collaboration on nuclear weapons and defense technology.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Mutual Defense Agreement (1958) canonical | 2 |
| US–UK Mutual Defence Agreement | 2 |
| 1958 Mutual Defense Agreement | 1 |
| US–UK Mutual Defense Agreement | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T70323 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
Target entity: Mutual Defense Agreement (1958) Context triple: [Anglo-American relations, includesAgreement, Mutual Defense Agreement (1958)]
-
A.
Korean Armistice Agreement
The Korean Armistice Agreement is the 1953 ceasefire accord that halted open hostilities on the Korean Peninsula and established the Demilitarized Zone between North and South Korea.
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B.
United States–Japan security alliance
The United States–Japan security alliance is a post–World War II defense partnership under which the U.S. guarantees Japan’s security and maintains military forces in and around Japan, forming a cornerstone of security architecture in the Asia-Pacific region.
-
C.
Treaty of Amity and Commerce (1778)
The Treaty of Amity and Commerce (1778) was a landmark agreement between the United States and France that recognized American independence and established vital commercial and diplomatic relations during the American Revolutionary War.
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D.
North Atlantic Treaty
The North Atlantic Treaty is the 1949 founding agreement that created the NATO military alliance, establishing collective defense commitments among Western nations during the early Cold War.
-
E.
Treaty of Alliance (1778)
The Treaty of Alliance (1778) was a formal military pact between France and the United States during the American Revolutionary War, marking France’s entry into the conflict against Britain and significantly bolstering the American cause.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Target entity: Mutual Defense Agreement (1958) Target entity description: The Mutual Defense Agreement (1958) is a landmark Cold War-era treaty that deepened U.S.–UK strategic cooperation by enabling extensive collaboration on nuclear weapons and defense technology.
-
A.
Korean Armistice Agreement
The Korean Armistice Agreement is the 1953 ceasefire accord that halted open hostilities on the Korean Peninsula and established the Demilitarized Zone between North and South Korea.
-
B.
United States–Japan security alliance
The United States–Japan security alliance is a post–World War II defense partnership under which the U.S. guarantees Japan’s security and maintains military forces in and around Japan, forming a cornerstone of security architecture in the Asia-Pacific region.
-
C.
Treaty of Amity and Commerce (1778)
The Treaty of Amity and Commerce (1778) was a landmark agreement between the United States and France that recognized American independence and established vital commercial and diplomatic relations during the American Revolutionary War.
-
D.
North Atlantic Treaty
The North Atlantic Treaty is the 1949 founding agreement that created the NATO military alliance, establishing collective defense commitments among Western nations during the early Cold War.
-
E.
Treaty of Alliance (1778)
The Treaty of Alliance (1778) was a formal military pact between France and the United States during the American Revolutionary War, marking France’s entry into the conflict against Britain and significantly bolstering the American cause.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
Cold War treaty
ⓘ
bilateral defense treaty ⓘ international agreement ⓘ |
| aimsTo | strengthen Western nuclear deterrence against the Soviet Union ⓘ |
| category |
Nuclear weapons policy of the United Kingdom
ⓘ
Nuclear Posture Review ⓘ
surface form:
Nuclear weapons policy of the United States
United States–United Kingdom military relations ⓘ |
| compliesWith | United States non-proliferation obligations as interpreted by the US government ⓘ |
| countryParty |
United Kingdom
ⓘ
surface form:
United Kingdom of Great Britain and Northern Ireland
United States of America ⓘ |
| enables |
cooperation on nuclear submarine propulsion technology
ⓘ
cooperation on nuclear warhead safety and reliability ⓘ joint work on nuclear weapons effects and testing data ⓘ transfer of nuclear weapons-related design information from the US to the UK ⓘ |
| enteredIntoForceDate | 1958-08-04 ⓘ |
| enteredIntoForceYear | 1958 ⓘ |
| era | Cold War ⓘ |
| field |
atomic energy
ⓘ
defense technology ⓘ nuclear weapons ⓘ |
| geopoliticalSignificance |
key instrument in NATO’s overall nuclear posture
ⓘ
symbol of the special relationship between the United States and the United Kingdom ⓘ |
| influencedBy | strategic competition with the Soviet Union ⓘ |
| language | English ⓘ |
| legalBasis |
Atomic Energy Act of 1954
ⓘ
surface form:
United States Atomic Energy Act of 1954 as amended
|
| officialName | Agreement between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland for Cooperation on the Uses of Atomic Energy for Mutual Defence Purposes ⓘ |
| purpose |
to deepen US–UK strategic cooperation on nuclear weapons and related technology
ⓘ
to enable cooperation on the uses of atomic energy for mutual defence purposes ⓘ to enhance joint nuclear deterrence capabilities of the US and UK ⓘ to facilitate cooperation on nuclear propulsion for naval vessels ⓘ to facilitate exchange of classified information on nuclear weapons design and manufacture ⓘ |
| relation |
complements the 1963 Polaris Sales Agreement
ⓘ
forms the legal framework for much of the US–UK nuclear relationship ⓘ supports the UK’s independent nuclear deterrent through US technical assistance ⓘ |
| renewal |
extended multiple times since 1958
ⓘ
periodically renewed by both governments ⓘ |
| renewalInterval | typically 10 years ⓘ |
| restriction |
cooperation limited to mutual defence purposes
ⓘ
does not authorize transfer of complete nuclear weapons ⓘ |
| shortName |
US–UK MDA
ⓘ
Mutual Defense Agreement (1958) self-linksurface differs ⓘ
surface form:
US–UK Mutual Defence Agreement
|
| signingDate | 1958-07-03 ⓘ |
| signingYear | 1958 ⓘ |
| status | in force ⓘ |
| subjectTo |
periodic review by the UK Parliament
ⓘ
periodic review by the US Congress ⓘ |
| typeOfCooperation |
collaboration on nuclear materials handling and safety
ⓘ
collaboration on nuclear weapons delivery systems-related technology ⓘ exchange of classified nuclear information ⓘ technical assistance on nuclear warhead design ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Subject: Mutual Defense Agreement (1958) Description of subject: The Mutual Defense Agreement (1958) is a landmark Cold War-era treaty that deepened U.S.–UK strategic cooperation by enabling extensive collaboration on nuclear weapons and defense technology.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.